iOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2019-01-22T18:08:40Z. The update package is 1.58 GB. This is a delta (partial) update that requires 11.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c957a7b9b2e2d9ffca2ff1229ee41b353c24a7c3.zip.